Seal of the gods wrote:REALLY? if its a lot less that'll be awesome
To store an hour of uncompressed raw as captured by the camera would be roughly 1.4 TB including audio. We've been told that the raw from the BMPC4K will be compressed and the approximate amount of compression discussed at NAB2013 was 2.5x since it will be lossy. Therefore one hour would take about 560 GB to capture on an SSD. If you are using a 480 GB SSD, you want to stop recording after about 52 minutes (same as uncompressed raw on the BMCC). At least that appeared to be BMD's goal at NAB2013: the compressed raw from the BMPC4K would take roughly the same amount of space as the uncompressed raw from the BMCC.
When you uncompress the raw and debayer it, you will be needing a lot more space to store your video files. That figure of 1.4 TB relates to the 12bits of log data written per photosite. If your debayered video was stored as uncompressed 10 bit YUV, the AJA video calculator says it will take 2.4 TB per hour. If 10 bit RGB, 3.6 TB per hour. If you transcode to ProRes 4:2:2 HQ (or shoot in ProRes 4:2:2 HQ), you will store 448 GB including audio per hour. Therefore a 480 GB SSD, will record at least an hour of ProRes 4:2:2 HQ including audio.
The AJA calculator may be stating the numbers a bit high but they are certainly in the ballpark.
Rick Lang
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